New York Natural Heritage Program
Mossy Valvata
Valvata sincera Say, 1824
Gastropods

General Description [-]
The shell is yellowish-brown, sub-globose to conic, about 5 mm wide, exhibiting four rounded whorls; the spire is moderately elevated.

Identifying Characteristics [-]
The shell is dextral, small, turreted, and moderately thin, with deeply impressed sutures. The spire is weakly elevated. There are approximately 2.5 inflated whorls, circular in cross section, gradually increasing in size. The surface appears dull due to fine growth lines. The color is a very light and translucent. The aperture is circular and entire; outer lip is straight; operculum multi-spiral, circular, fragile and translucent.

Characters Most Useful for Identification [-]
The small size, but with a high spire, is distinctive.

Best Life Stage for Proper Identification [-]
Adult

Behavior [-]
The snails attach their egg capsules to aquatic plants.

Diet [-]
As is common among small freshwater snails, we presume this species scrapes biofilms from submerged surfaces. In turn, it forms an important part of the diet for Whitefish and Perch.
Mossy Valvata Images
click to enlarge
The Best Time to See
This species has an annual life cycle.
J F M A M J J A S O N D
Present Larvae present and active
The time of year you would expect to find Mossy Valvata present (blue shading) and larvae present and active (orange shading) in New York.
Similar Species
  • Threeridge Valvata (Valvata tricarinata)
    The radula of these two species is similar.